Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 455 · 40 questions

The trick (Chain the factors): Split the multiplier into two small factors: 12 = 3 × 4, 14 = 2 × 7, 15 = 3 × 5, 16 = 4 × 4, 18 = 2 × 9, 24 = 4 × 6. Multiply by the first factor. Multiply that answer by the second factor (× 4 is double, double).

1. 1.31 × 16 =
2. 2.32 × 16 =
3. 3.49 × 12 =
4. 4.17 × 15 =
5. 5.16 × 12 =
6. 6.16 × 24 =
7. 7.47 × 14 =
8. 8.19 × 15 =
9. 9.49 × 15 =
10. 10.15 × 12 =
11. 11.29 × 15 =
12. 12.21 × 15 =
13. 13.17 × 14 =
14. 14.13 × 24 =
15. 15.12 × 24 =
16. 16.35 × 12 =
17. 17.28 × 18 =
18. 18.28 × 15 =
19. 19.37 × 24 =
20. 20.17 × 24 =
21. 21.20 × 12 =
22. 22.38 × 15 =
23. 23.15 × 18 =
24. 24.37 × 14 =
25. 25.41 × 15 =
26. 26.38 × 24 =
27. 27.12 × 16 =
28. 28.20 × 16 =
29. 29.26 × 18 =
30. 30.27 × 15 =
31. 31.44 × 18 =
32. 32.30 × 18 =
33. 33.30 × 14 =
34. 34.45 × 24 =
35. 35.15 × 24 =
36. 36.21 × 18 =
37. 37.37 × 16 =
38. 38.46 × 12 =
39. 39.38 × 18 =
40. 40.18 × 18 =

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks